<template>
    <el-row class="login-container">
        <el-col :lg="16" :md="12" class="left">
            <div>
                <div>欢迎光临</div>
                <div>此站点是《vue3+vite商城后台开发》的演示地址</div>
            </div>
        </el-col>
        <el-col :lg="8" :md="12" class="right">
            <h2 class="title">欢迎回来</h2>
            <div>
                <span class="line"></span>
                <span>账号密码登录</span>
                <span class="line"></span>
            </div>
            <el-form ref="formRef" :model="form" :rules="rules" class="w-[250px]">
                <el-form-item prop="username">
                    <el-input v-model="form.username " placeholder="请输入用户名">
                        <template #prefix>
                            <el-icon><User /></el-icon>
                        </template>
                    </el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input v-model="form.password" type="password" placeholder="请输入密码" show-password>
                        <template #prefix>
                            <el-icon><Lock /></el-icon>
                        </template>
                    </el-input>
                </el-form-item>
                <el-form-item>
                    <el-button type="primary" @click="onSubmit" class="w-[250px]" round color="#626aef" :loading="loading">登录</el-button>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<script setup>
import { ref, reactive, onMounted, onBeforeUnmount } from 'vue'
import { toast } from '~/composables/util'
import { useRouter } from 'vue-router'
import { useStore } from 'vuex'


const router = useRouter()
const store = useStore()
const loading = ref(false)


const form = reactive({
    username: '',
    password: ''
})

// 校验规则
const rules = {
    username: [
        {
            required: true,
            message: '用户名不可以为空',
            trigger: 'blur'
        },
        {
            min: 3,
            max: 11,
            message: '用户名长度在3-11个字符之间',
            trigger: 'blur'
        }
    ],
    password: [
        {
            required: true,
            message: '密码不可以为空',
            trigger: 'blur'
        },
        {
            min: 5,
            message: '密码长度不能小于5个字符',
            trigger: 'blur'
        }
    ]
}

const formRef = ref(null)

// 登录事件
const onSubmit = () => {
    formRef.value.validate(async (valid) => {
        if(!valid){
            return false
        }
        loading.value = true
        await store.dispatch('login',form).then(res => {
            toast('登录成功')
            router.push('/')
        }).finally(() => {
            loading.value = false
        })
    })
}

// 监听回车事件
function onKeyUp(e){
    if(e.key == 'Enter'){
        onSubmit()
    }
}

// 添加监听事件
onMounted(() => {
    document.addEventListener('keyup',onKeyUp)
})

// 移除监听事件
onBeforeUnmount(() => {
    document.removeEventListener('keyup',onKeyUp)
})

</script>

<style scoped>
.login-container {
    @apply min-h-screen bg-indigo-500;
}
.login-container .left,.login-container .right{
    @apply flex items-center justify-center;
}
.login-container .right{
    @apply bg-light-50  flex-col;
}
.left>div>div:first-child{
    @apply font-bold text-5xl text-light-50 mb-4;
}
.left>div>div:last-child{
    @apply text-gray-200 text-sm;
}
.right .title{
    @apply font-bold text-3xl text-gray-800;
}
.right>div{
    @apply flex items-center justify-center my-5 text-gray-300 space-x-2;
}
.right .line{
    @apply h-[1px] w-16 bg-gray-200;
}

</style>
